I was recently asked on Twitter by @dcernosek about the Zebra Sharbo X ink colors that I have, so I wrote a few lines on the page at left. I have been using the black/mandarin orange combo in one of my Sharbos, and royal blue/carmine red in the other. I also just received the limited edition cool gray and violet refills from JetPens, which are very nice as well. The violet is especially dark, reminding me of the Uni-Ball Signo RT lavender black ink that is one of my favorites.
I'm not completely satisfied with how my photography/editing skills are representing the colors, so I may try to post some color swatches if I get the chance later today. You can see them pretty well in the XL version of the photo though.
